Safety valve device with pressure memory function

Abstract

The utility model relates to a kind of safety valve devices with pressure memory function, including valve seat and the valve body being installed on valve seat, and the valve cover being assembled in the top of valve body, valve body is provided with valve clack, spring is provided between valve clack and valve cover, rupture disc is provided between valve seat and valve body, the side of valve body is provided with pressure gauge for monitoring the inside pressure of rupture disc, and pressure gauge is memory type pressure gauge.The utility model can know that rupture disc will soon break, and the medium in pressure vessel will soon leak out, so as to adjust the pressure in pressure vessel in time, to avoid the breakage of rupture disc and the leakage of medium in subsequent, effectively reduce the use cost of safety valve, avoid pollution to atmospheric environment, use more safely and reliably.

Description

Technical Field

[0001] This utility model belongs to the field of safety valve technology, specifically relating to a safety valve device with pressure memory function. Background Technology

[0002] Safety valves are an important safety accessory on storage and transportation equipment for various hazardous chemical media such as liquefied petroleum gas. A safety valve is a self-balancing regulating system that releases overpressure. When the upward force exerted on the lower part of the valve disc by the pressure of the sealed medium is equal to or greater than the force exerted on the upper part of the valve disc by the spring, the valve disc is lifted, the safety valve opens, the overpressured medium is discharged, and the medium pressure drops. When the force acting on the upper part of the valve disc is greater than the force exerted on the lower part of the valve disc by the medium, the safety valve will close.

[0003] Existing safety valves mounted on pressure vessels contain a rupture disc to isolate the pressure vessel from the outside air, preventing air from entering and causing problems such as deterioration of the internal medium. These valves also have a pressure gauge installed to monitor pressure changes at the rupture disc's inlet, allowing for easy assessment of disc rupture.

[0004] However, with this type of safety valve, the pressure gauge will return to zero after the rupture disc ruptures due to overpressure, failing to record the pressure at the moment of rupture. This makes it unclear whether the rupture disc meets design requirements, lacking practical significance for design guidance. Furthermore, this not only necessitates frequent replacement of the rupture disc, increasing the operating cost of the safety valve, but also poses a risk of environmental pollution from the leakage of special media stored in the pressure vessel. Utility Model Content

[0005] The purpose of this invention is to provide a safety valve device with pressure memory function to solve the problem of not being able to know the pressure value following the rupture of the rupture disc.

[0006] The safety valve device with pressure memory function of this utility model is implemented as follows:

[0007] A safety valve device with pressure memory function includes a valve seat and a valve body mounted on the valve seat, and a valve cover assembled on the top of the valve body. A valve disc is provided in the valve body, and a spring is provided between the valve disc and the valve cover. A rupture disc is provided between the valve seat and the valve body. A pressure gauge for monitoring the pressure inside the rupture disc is provided on one side of the valve body. The pressure gauge is a memory type pressure gauge.

[0008] Furthermore, one side of the valve seat is provided with a mounting hole communicating with its interior, and the connector of the pressure gauge is assembled in the mounting hole.

[0009] Furthermore, the portion of the rupture disc located inside the valve body has an upward-facing convex spherical shape.

[0010] Furthermore, a positioning ring is provided on the upper side of the rupture disc, and the inner ring of the positioning ring is bent toward the valve body.

[0011] Furthermore, sealing gaskets are installed between the rupture disc and the valve seat and valve body, respectively.

[0012] Furthermore, a pull tab extending to the outside of the valve seat is provided on one side of the rupture disc.

[0013] Furthermore, the outer circumferential surface of the valve disc is an arc surface, and a sealing ring is installed on the arc surface.

[0014] Furthermore, the upper surface of the valve disc is provided with an annular groove, the inner wall of the top of the valve cover is provided with a circular boss, the lower end of the spring is fitted in the annular groove, and the upper end is fitted outside the circular boss.

[0015] Furthermore, a vent is provided on the outer wall of the valve body, and the vent is covered with a flame-retardant mesh.

[0016] Furthermore, the valve body is connected to the valve seat by fastening bolts.

[0017] After adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0018] This invention installs a memory-type pressure gauge on the valve body, which can record the instantaneous pressure when the rupture disc bursts in real time. By observing the positional relationship between the pressure pointer and the memory pointer on the pressure gauge, it is possible to confirm whether the design of the rupture disc is reasonable and whether the selection of the rupture disc is qualified. This allows for timely adjustment of the safety valve's set pressure during the design phase, preventing subsequent rupture disc breakage and media leakage. This effectively reduces the operating cost of the safety valve, avoids pollution to the atmospheric environment, and makes its use safer and more reliable. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a first-view structural schematic diagram of a safety valve device with pressure memory function according to a preferred embodiment of the present invention;

[0021] Figure 2 This is a second-view structural schematic diagram of a safety valve device with pressure memory function (without flame arrestor) according to a preferred embodiment of the present invention.

[0022] Figure 3This is an axial cross-sectional view of the safety valve device with pressure memory function in the first direction according to a preferred embodiment of the present invention;

[0023] Figure 4 This is an axial cross-sectional view of the safety valve device with pressure memory function in the second direction according to a preferred embodiment of the present invention.

[0024] Figure 5 yes Figure 4 Enlarged view of section A;

[0025] In the diagram: 1. Valve seat; 2. Valve body; 3. Valve cover; 4. Valve disc; 5. Spring; 6. Rupture disc; 7. Pressure gauge; 8. Mounting hole; 9. Positioning ring; 10. Upper sealing gasket; 11. Lower sealing gasket; 12. Pull-out plate; 13. Sealing ring; 14. Circular groove; 15. Circular boss; 16. Vent window; 17. Flame arrestor mesh; 18. Fastening bolt. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] like Figure 1-5 As shown, a safety valve device with pressure memory function includes a valve seat 1 and a valve body 2 mounted on the valve seat 1, and a valve cover 3 assembled on the top of the valve body 2. A valve disc 4 is provided inside the valve body 2, and a spring 5 is provided between the valve disc 4 and the valve cover 3. A rupture disc 6 is provided between the valve seat 1 and the valve body 2. A pressure gauge 7 for monitoring the pressure inside the rupture disc 6 is provided on one side of the valve body 2. The pressure gauge 7 is a memory type pressure gauge.

[0029] Among them, when the pressure of the measured medium increases, the pressure pointer of the memory pressure gauge 7 drives the memory pointer to rise, and when the pressure decreases, it maintains the position of the memory pointer to record the highest pressure value.

[0030] In this embodiment, the burst pressure of the rupture disc 6 can be determined in advance through a burst test, thereby determining the position of the memory pointer of the pressure gauge 7. Specifically, during the test, the pressure inside the rupture disc 6 is continuously increased. This causes the pressure pointer to rise, leading to the memory pointer. When the pressure reaches the burst pressure, the rupture disc 6 ruptures, and the pressure inside the rupture disc 6 decreases. During this process, the burst pressure of the rupture disc 6 is the maximum pressure, and the memory pointer of the pressure gauge 7 remains at this burst pressure position. After installing the pressure gauge 7 on a safety valve and applying it to a pressure vessel, the positional relationship between the pressure pointer and the memory pointer can be observed to determine whether the rupture disc 6 is about to burst.

[0031] To facilitate monitoring of pressure changes inside the rupture disc 6 using the pressure gauge 7, a mounting hole 8 communicating with the inside of the valve seat 1 is provided on one side, and the connector of the pressure gauge 7 is assembled in the mounting hole 8.

[0032] In order to improve the pressure-bearing capacity and stability of the rupture disc 6, the part of the rupture disc 6 located inside the valve body 2 is an upward convex spherical shape.

[0033] Compared to a planar rupture disc 6, the spherical structure avoids localized stress concentration, thus significantly improving the overall pressure-bearing capacity and stability of the rupture disc 6. Furthermore, when the pressure inside the rupture disc 6 increases, the curvature of the spherical surface causes the diaphragm to undergo tensile failure first at its weakest point, resulting in a more regular rupture process and avoiding deviations in rupture pressure caused by structural irregularities.

[0034] In order to position the rupture disc 6, a positioning ring 9 is provided on the upper side of the rupture disc 6, and the inner ring of the positioning ring 9 is bent toward the valve body 2.

[0035] The bending direction of the inner ring of the positioning ring 9 is the same as the spherical protrusion direction of the rupture disc 6. The ring structure formed by this bending part surrounds the convex spherical shape of the rupture disc 6, thereby positioning the rupture disc 6, ensuring that the central axis of the rupture disc 6 is coaxial with the internal channel of the safety valve, and preventing the rupture disc 6 from shifting under the action of medium pressure, thus avoiding leakage or rupture failure.

[0036] To ensure the sealing of the installation position of the rupture disc 6 and avoid leakage, sealing gaskets are installed between the rupture disc 6 and the valve seat 1 and the valve body 2, respectively.

[0037] The upper sealing gasket 10, located between the rupture disc 6 and the valve body 2, is positioned on the upper side of the positioning ring 9, and a water ripple sealing line is provided on the lower surface of the valve body 2. The sealing effect between the two can be further enhanced by the cooperation between the water ripple sealing line and the upper sealing gasket 10.

[0038] The lower sealing gasket 11 is located between the rupture disc 6 and the valve seat 1. The upper surface of the valve seat 1 is also provided with a water ripple sealing line. The sealing effect between the two is further enhanced by the cooperation between the water ripple sealing line and the lower sealing gasket 11.

[0039] After the rupture disc 6 ruptures, a pull tab 12 extending to the outside of the valve seat 1 is provided on one side of the rupture disc 6 to facilitate the removal of the rupture disc.

[0040] Preferably, the outer end of the pull tab 12 has a downward bending structure, which allows the rupture disc 6 to be easily removed through the pull tab 12.

[0041] To ensure the safety valve is sealed when closed, the outer ring of the valve disc 4 is an arc surface, and a sealing ring 13 is installed on the arc surface.

[0042] The arc surface is provided with a sealing groove, and the sealing ring 13 is installed in the sealing groove.

[0043] The valve body 2 is provided with an inclined annular surface that mates with the arc surface. When the safety valve is closed, the valve disc 4 moves under the action of the spring 5, and the arc surface abuts against the inclined annular surface inside the valve body 2 to seal the safety valve. At the same time, the sealing ring 13 can ensure the sealing performance of the safety valve when it is closed.

[0044] In order to position the two ends of the spring 5, an annular groove 14 is provided on the upper surface of the valve disc 4, and a circular boss 15 is provided on the top inner wall of the valve cover 3. The lower end of the spring 5 is fitted in the annular groove 14, and the upper end is fitted on the outside of the circular boss 15.

[0045] Among them, the bursting pressure of the rupture disc 6 is greater than the set pressure of the spring 5.

[0046] When the pressure of the medium inside the pressure vessel exceeds the burst pressure of the rupture disc 6, a vent 16 is provided on the outer wall of the valve body 2 to facilitate the release of the medium, and a flame arrestor mesh 17 is provided on the vent 16.

[0047] When the pressure of the medium inside the pressure vessel exceeds the burst pressure of the rupture disc 6, the rupture disc 6 ruptures, and the medium pushes open the valve disc 4 and is discharged outward through the vent window 16 on the valve body 2, thus protecting the safety of the pressure vessel.

[0048] The flame arrestor 17 is designed to isolate the fire in the event of a fire outside the pressure vessel, preventing it from entering the pressure vessel and improving safety. The flame arrestor 17 is a ring-shaped structure that wraps around the outside of the valve body 2 where the vent window 16 is located, and is fixed at both ends with bolts.

[0049] In order to connect the valve body 2 and the valve seat 1, the valve body 2 is connected to the valve seat 1 by fastening bolts 18.

[0050] The valve seat 1 is installed on the pressure vessel by welding, and the valve body 2 is connected to the valve seat 1 by fastening bolts 18, which makes it easier to disassemble and facilitates the replacement and maintenance of parts such as the rupture disc 6 inside the safety valve.

[0051] This invention installs a memory-type pressure gauge on the valve seat 1 to obtain the instantaneous pressure at the moment the rupture disc 6 bursts (i.e., the burst pressure of the rupture disc 6). Then, by observing the positional relationship between the pressure pointer and the memory pointer on the pressure gauge 7, it can be determined whether the rupture disc 6 is about to rupture. This allows for timely intervention to manage the pressure of the medium within the pressure vessel, such as using a pressure relief valve. For special media (e.g., those with environmental pollution effects), recovery equipment can be used to recover the media during pressure relief, reducing resource waste. This method effectively prevents the rupture disc 6 from rupturing and the media from leaking out unnecessarily, reducing the operating cost of the safety valve and preventing environmental pollution.

[0052] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A safety valve device with pressure memory function, characterized in that, The valve includes a valve seat (1) and a valve body (2) mounted on the valve seat (1), and a valve cover (3) mounted on the top of the valve body (2). A valve disc (4) is provided inside the valve body (2). A spring (5) is provided between the valve disc (4) and the valve cover (3). A rupture disc (6) is provided between the valve seat (1) and the valve body (2). A pressure gauge (7) for monitoring the pressure inside the rupture disc (6) is provided on one side of the valve body (2). The pressure gauge (7) is a memory type pressure gauge (7).

2. The safety valve device with pressure memory function according to claim 1, characterized in that, The valve seat (1) has a mounting hole (8) communicating with its interior on one side, and the connector of the pressure gauge (7) is assembled in the mounting hole (8).

3. The safety valve device with pressure memory function according to claim 1, characterized in that, The portion of the rupture disc (6) located inside the valve body (2) is an upward-facing convex spherical shape.

4. The safety valve device with pressure memory function according to claim 1, characterized in that, A positioning ring (9) is provided on the upper side of the rupture disc (6), and the inner ring of the positioning ring (9) is bent toward the valve body (2).

5. The safety valve device with pressure memory function according to claim 1, characterized in that, A sealing gasket is installed between the rupture disc (6), the valve seat (1), and the valve body (2).

6. The safety valve device with pressure memory function according to claim 1, characterized in that, One side of the rupture disc (6) is provided with a pull tab (12) extending to the outside of the valve seat (1).

7. The safety valve device with pressure memory function according to claim 1, characterized in that, The outer ring surface of the valve disc (4) is an arc surface, and a sealing ring (13) is installed on the arc surface.

8. The safety valve device with pressure memory function according to claim 1, characterized in that, The upper surface of the valve disc (4) is provided with an annular groove (14), and the inner top wall of the valve cover (3) is provided with a circular boss (15). The lower end of the spring (5) is fitted in the annular groove (14), and the upper end is fitted outside the circular boss (15).

9. The safety valve device with pressure memory function according to claim 1, characterized in that, The valve body (2) is provided with a ventilation window (16) on its outer wall, and the ventilation window (16) is covered with a fireproof mesh (17).

10. The safety valve device with pressure memory function according to claim 1, characterized in that, The valve body (2) is connected to the valve seat (1) by fastening bolts (18).

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